In order to maintain a good physical condition in preparation for the fireman movie I am about to shoot,  not long ago I increased my level of exercise so that I will be able to get used to the added physical exertion.   Since there will be many action scenes that require a lot of expended energy,  my fans and friends have been worried about my knee injury.   Actually I have regularly been getting check-ups and doing physical therapy all along,  which has strengthened my injury.   Please don't worry about me.